Even with a handful of dyno runs and tire-killing burnouts, we still managed to squeak 16 mpg out of Project Street-Max yesterday...

 If you recall, prior to our live tuning session last week (with the stock nozzle EFILive tunes), we averaged just 13.9 mpg with mostly highway driving. Now that the truck is tuned, and adding in the fact that we played around quite a bit yesterday, we think an easy 17-to-18 mpg is achievable with our lifted, 600hp GMC. For now, it'll get parked for the winter in an effort to keep the road salt off it.